Thanks for your Reply! But I cannot search in this File ( Mine looks like this: http://img841.imageshack.us/img841/245/meea.png ) It seems to be encrypted... Which script did you used to decrypt the ChunksX.toc Files?
Where are those Chunk Files in the Cas Files? Im not familiar with Python and tried to find the Content of some Chunk Files in the Cas Archives, but with no success. I know its not possible to re-pack the files, but it should be possible to modify them in the Cas Files directly without extraction, i guess.